JP3206593B2 - Cutting device for recording paper in recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus such as a facsimile or a copier, which records a long recording sheet while pulling it out, and then cuts the recording sheet into a predetermined length. More specifically, it relates to the structure of a safety device in this type of cutting device.

[0002]

2. Description of the Related Art Conventionally, as a recording paper cutting apparatus of this kind, as disclosed in Japanese Patent Application Laid-Open No. 1-159192, a rotating blade is substantially parallel to a longitudinal cutting edge of a fixed blade. A so-called guillotine-type cutting device that comes and goes in a shape, and the fixed blade and the rotating blade are arranged diagonally so that the rotating blade approaches the longitudinal cutting edge of the fixed blade in order from one side. There is a scissors-type cutting device.

[0003]

Generally, this type of cutting device is provided near the inside of a paper discharge port of a recording apparatus.
The discharge port has a considerably large gap so as not to obstruct the discharge of the recording paper. Particularly, in the scissors-type cutting device, the interval between the fixed blade body and the rotary blade body on the other side in the longitudinal cutting portion is large. Therefore, an object having a small size, such as a child's finger, can enter the gap in the cutting portion of the cutting device from the gap of the paper discharge port, and the cutting device operates with such an object entering the cutting portion. Then it is extremely dangerous.

An object of the present invention is to improve the safety of this type of scissors-type cutting device.

[0005]

According to a first aspect of the present invention, there is provided a recording sheet cutting apparatus for a recording apparatus, comprising:
In a recording apparatus comprising a cutting device for cutting the sheet to be discharged to the outside from a discharge port of the case, a fixed blade body in the cutting device, and a long rotating blade facing a long cutting edge of the fixed blade body. And the fixed blade is disposed below a recording paper feed path, and the rotating blade is disposed in the case such that the longitudinal direction thereof is substantially parallel to the paper discharge port of the case. The rotating blade body is disposed in an inclined manner so that a gap increases from one longitudinal side of the blade edge of the fixed blade body to the other side, The rotary blade is provided with a safety protector for preventing foreign matter from entering from the paper discharge port at a position where the clearance between the fixed blade and the blade is narrowed, and the sectional shape of the safety protector is fixed blade. It is formed in a convex curved shape protruding toward the gap direction with the blade edge of the body

[0006] The invention described in claim 2 is the invention according to claim 1.
Wherein the safety protector is provided downward on the rotary blade so that a gap between the fixed blade and the cutting edge is approximately 5 mm or less. .

According to a third aspect of the present invention, in the apparatus for cutting a recording sheet in the recording apparatus according to the first or second aspect, the safety protector has a cross section substantially perpendicular to a longitudinal direction thereof. Are formed so as to increase as the gap between the blade edge of the rotating blade body and the blade edge of the fixed blade body increases.

[0008]

Next, an embodiment of the present invention will be described. FIG. 1 is a side sectional view of a facsimile apparatus as one form of a recording apparatus. In the figure, an upper cover 2 and a front cover 3 are attached to a main body case 1 so as to be openable and closable, and are placed on a document tray 4 which is inclined between the front cover 3 and the upper cover 2. The document sheet (not shown) placed with the transmission surface down is separated one by one by a document separation and feeding device 5 arranged near the feeding port, and the image reading unit on the downstream side of the feeding is separated. Sent to 6.

A light source 10 disposed between the feed roller 8 and the paper discharge roller 9 emits light on the transmission surface of the original paper which is fed while being sandwiched between the pressing roller 7 and the feed roller 8 in the image reading section 6. The reflected light is reflected, and the reflected light is input to imaging means (CCD solid-state imaging device or the like) 12 via two mirrors 11a and 11b to read an image, and the image is transmitted through a transmitting unit (not shown). Is sent. The read original sheet is discharged from the discharge roller 9 to the outside of the apparatus.

The operation panel 13 is provided on the front cover 3. A semi-cylindrical roll paper tray 15 having an open upper side for storing a roll-shaped (elongated) recording paper 14 such as thermal paper is provided at the center in the front-rear direction of the main body case 1, An image recording unit 17 for receiving or the like is mounted on the lower surface of the upper cover body 2 which can be opened upward and pivotable about the pivot 16 of the image recording unit 1.
The feed path between the roll paper tray 7 and the rear end of the roll paper tray 15 is provided with a curl removing unit 18 for correcting the curl of the rolled recording paper 14. The recording paper 14 on which the image is recorded by the image recording unit 17 is cut by a cutting device 19 described in detail later.
And is received by the paper tray 20 from the paper discharge port 35.

The lower surface flange 2a of the upper cover 2 has a curl removing plate 21 provided with a downwardly convex nose 21a in the curl removing unit 18, a thermal head 22 in the recording unit 17, and a platen roller 25. Is fixed with the screw 24. Thermal head 2
2 is pressed by the pressing spring 26 toward the upper peripheral surface of the platen roller 25. The platen roller 25 is driven by a drive motor (not shown) capable of rotating forward and backward.

A support roller 27 having a circular cross section in the curl removing section 18 is disposed in a feed path space between the ridge guide section at the upper end of the rear piece 15b of the roll paper tray 15 and the curl removing plate 21. That is, the left and right ends of the support roller 27 are supported by the front and rear long hole-shaped guide portions of the pair of left and right end holders 31 so as to be movable back and forth in the feeding direction. End holders 31, 31
Is rotatably supported at its base end by a pivot shaft 32. The pair of left and right end holders 31, 31
It is urged upward by a bendable and extendable coil spring 30 that is inserted into the left and right mounting portions 29 of the support plate portion 28 of the main body case 1.

When the upper cover body 2 is opened, the front and rear elongated guides of the pair of left and right end holders 31, 31 are formed by rear pieces 15b of the roll paper tray 15.
Left and right end holders 31, 31 so as to incline downward
Is tilted, and the support roller 27 inserted into the pair of end holders 31 and the elongated hole-shaped guide portion is separated from the pivotal support portion 16 which is the center of rotation of the upper cover body 2 (feeding direction). (Upstream). In this state, the left and right ends of the support roller 27 are prevented from moving downward by stoppers (not shown) projecting from the support plate 28 and the like of the main body case 1.

Further, a hook 3 attached to the upper cover 2
4, 34 are provided so as to project downward and forward from both left and right sides of the lower part of the curl removing plate 21, and in this embodiment,
Each of the plate-shaped hook bodies 34 is formed such that the lower edge thereof has a “H” shape in side view. As the upper cover body 2 rotates downward, the hook bodies 34 press the upper surfaces of the right and left ends of the support roller 27 downward against the urging force of the coil spring 30, and further close the upper cover body 2 in the closing direction. When turned downward, the lower edge of each hook body 34
With the support roller 27 held so as to move to the downstream side of the feeding, the upper cover 2 is closed with respect to the main body case 1 (FIG. 3).
), The support roller 27 is restricted so as not to be able to move back and forth at the lower edge portion of the hook body 34 in the downward L-shape.

Next, referring to FIGS. 2, 4 to 6,
The structure of the cutting device 19 will be described. Cutting device 19
Are a fixed blade body 37 having a left and right longitudinal blade facing upward, a rotating blade body 38 having a longitudinal blade facing downward so as to face the longitudinal blade of the fixed blade body 37, and a main body case 1 supporting these. And a frame 36 inside the frame. The left and right pivot shafts 40 and 41 of the lower blade frame 39 to which the fixed blade body 37 is attached,
Left and right side plate portions 36a, 36b of the frame 36
The rotary blades 38 are rotatably supported by supporting holes 42, 42 formed in a substantially 8-character shape, and the rotary shafts 44, 45 provided on the left and right sides of an upper blade frame 43 to which the rotary blade body 38 is attached. One of the rotating shafts 44 is rotatably fitted in the round hole 46 of the one side plate portion 36a, and the other rotating shaft 45 is fitted in a polished support hole 47 formed in the other side plate portion 36b. The gap between the blade edge of the fixed blade body 37 and the blade edge of the rotary blade body 38 is large on the one side plate portion 36a side and the other side plate portion 3
The fixed blade 37 and the rotating blade 3
8 are arranged so as to be inclined. In addition, the anti-sticking piece 48 protruding upward from the end of the fixed blade body 37.
Abuts on the side where the gap dimension with the rotary blade body 38 is small.

The lower blade frame 39 is biased in the direction of the one side plate portion 36a by the coil portion of the torsion coil spring 49 which is loosely fitted to the other pivot shaft 41, and one end of the torsion coil spring 49 is engaged. The stop portion 49 a is pressed and locked on the back surface of the lower blade frame 39, and the other end locking portion 49 of the torsion coil spring 49 is locked.
b is pressed upward from the lower surface side of the other rotary shaft 45 of the upper blade frame 43 to prevent it from falling out of the support hole 47.

The drive of the drive motor 52, which rotates in the forward and reverse directions,
The upper blade frame 43 is rotated around the axis of the rotation shaft 45 by largely rotating the lever 50 via a transmission unit such as the transmission shaft 51. 4 is provided on the lower surface side of the upper blade frame 43 having an L-shaped cross section to which the rotary blade body 38 is attached.
(6) A safety protector 53 as shown in FIG.
The safety protector 53 is provided in a portion of the rotary blade body 38 where the clearance between the blade of the fixed blade 37 is large and the clearance between the safety protector 53 and the blade of the fixed blade 37 (H1) is small. It is set so as to be equal to or less than a predetermined value (about 5 mm) so that even the fingertip of a child cannot enter the recording paper cutting portion between the rotating blade body 38 and the fixed blade body 37. .

The safety protector 53 in the embodiment is
It is preferable that the safety protector 53 be integrally molded with a hard synthetic resin material, and the cross-sectional area of the safety protector 53 in the direction perpendicular to the longitudinal direction increases as the clearance between the rotary blade body 38 and the fixed blade body 37 increases. It is formed so as to increase substantially in proportion, and the projecting direction of the cross section is substantially directed to the cutting edge direction of the fixed blade body 37. As a result, the lower end of the upper frame 43 to which the rotating blade body 38 is attached is parallel to the cutting edge of the rotating blade body 38, and the board portion 53b of the safety protector 53 is mounted along the lower surface of the upper frame 43. When
Since the clearance dimension between the outer edge along the longitudinal direction of the safety protector 53 and the cutting edge of the fixed blade body 37 can be set to substantially the same state, any position along the longitudinal direction of the fixed blade body 37 can be set. Even small objects such as children's fingertips can be prevented from entering.

The cross section of the safety protector 53 in a direction perpendicular to the longitudinal direction is substantially fan-shaped so as to be substantially directed in the direction of the cutting edge of the fixed blade body 37. Recording paper 1 that has progressed with the body 37
4 is smoothly curved along the fan-shaped surface of the safety protector 53, and the rotating blade body 38 and the fixed blade body 3 are curved.
7 can be passed smoothly.

Further, the substantially fan-shaped projection 53a in the side view of the safety protector 53 is downwardly directed at a certain interval from the substrate 53b (toward the edge of the fixed blade 37).
If the cross-sectional shape of each protruding portion 53a is formed in a convex curved shape protruding from the blade edge of the rotating blade body toward the gap direction with the blade edge of the fixed blade body, the weight of the safety protector 53 is reduced. In addition, the contact area with the surface of the recording paper 14 to be cut is reduced, and the paper jam of the recording paper 14 passing between the rotating blade body 38 and the fixed blade body 37 is caused by the contact. Can be prevented.

The board section 53 of the safety protector 53
b, the plurality of split pin-shaped locking portions 53c projecting upward are engaged with the engaging holes 43a of the lower plate portion of the upper blade frame 43 so as not to fall off, making the mounting work of the safety protector 53 extremely easy. Become. Next, the operation will be described. During the recording operation, as shown by the dashed line in FIG. 3, the recording paper 14 that is pulled out once in a state of being bent downward at the upper end of the ridge guide 15 a is supported by the support rollers 27 and The recording paper 14 is guided by the nose portion 21 a of the curl removing plate 21.
After the curl is removed, the recording paper 14 sandwiched between the platen roller 25 and the thermal head 22 is bent in the arrow B direction of the platen roller 25 after being bent into a substantially S-shape in a direction opposite to the curl habit of the roll. Cutting device 1 by rotary drive of
It is fed in nine directions (arrow A direction).

When the printing of a predetermined amount is completed, the rotation of the platen roller 25 is stopped, and then, when the rotating blade body 38 of the cutting device 19 is rotated, the rotating blade body 38 is sequentially rotated from one side of the longitudinal cutting edge. The recording paper 14 is cut close to the blade edge of the fixed blade body 37, and is received by the paper tray 20 behind the paper discharge port 35. In this case, since the safety protector 53 rotates integrally with the rotating blade body 38, it does not obstruct the passage of the recording paper 14 even when the cutting device 19 is not operated. Further, even when the cutting device 19 is not operated, the gap between the safety protector 53 and the cutting edge of the fixed blade 37 can be set small. It is safe because it cannot enter the cut.

It goes without saying that the safety protector of the present invention can also be applied to a cutting device in another type of recording device such as a copying machine.

[0024]

Operation and Effect of the Invention As described in detail above, claim 1
According to the invention described in the above, in the recording device comprising a cutting device for sequentially cutting the long recording paper housed in the case from the discharge port of the case to the outside, the cutting device, The fixed blade body and the long rotating blade body facing the long blade edge of the fixed blade body are provided in the case so that their longitudinal directions are substantially parallel to the paper discharge port in the case, A fixed blade is arranged below the feeding path of the recording paper, the rotating blade is arranged so as to face above the feeding path, and the rotating blade is a longitudinal blade of the fixed blade. The rotating blade body is provided with a safety protector for preventing foreign matter from entering from the paper discharge port, and is disposed on the rotating blade body in an inclined manner so that a gap increases from one side to the other side. The safety protector is provided at a position where the clearance between the blade and the blade is narrowed, and the cross-sectional shape of the safety protector is set to the blade of the fixed blade. It is obtained by forming a convex curved shape protruding toward the gap direction between. Therefore, even if the gap between the cutting devices in the non-operating state is large, the safety protector can prevent foreign substances from entering through the paper discharge port, thereby significantly improving safety. . Then, since the fixed blade body is placed on the lower side and the rotating blade body is arranged on the upper side of the recording paper feeding path, in a state where the rotating blade body is rotated to form a gap with the fixed blade body, There is an effect that the recording blade can be easily inserted into the gap by stopping the rotating blade.

The invention described in claim 2 is the first invention.
Wherein the safety protector is provided downward on the rotary blade so that a gap between the fixed blade and the cutting edge is approximately 5 mm or less. Therefore, in addition to the effect of the invention as set forth in claim 1, even a small foreign object such as a fingertip of a child can be prevented from entering due to the presence of the safety protector. This has the effect that it can be provided.

According to a third aspect of the present invention, in the recording paper cutting apparatus of the first or second aspect, the safety protector has a cross section substantially perpendicular to a longitudinal direction thereof. Is formed so as to increase as the gap between the cutting edge of the rotary blade and the cutting edge of the fixed blade increases, so that the outer edge along the longitudinal direction of the safety protector and the cutting edge of the fixed blade are Can be set in substantially the same state. Therefore, it is possible to easily insert the recording paper into the gap between the fixed blade and the rotating blade stopped above the fixed blade, and at any point along the longitudinal direction of the fixed blade (rotating blade). This has an effect that even a small object such as a fingertip of a child can be prevented from entering the cutting edge portion.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a facsimile machine.

FIG. 2 is a plan view taken along the line II-II of FIG.

FIG. 3 is a side sectional view of a main part of a curl removing unit in an upper cover body closed state.

FIG. 4 is a perspective view of a cutting device.

FIG. 5 is a view of the cutting device as viewed from the downstream side of the feeding.

6 is a sectional view taken along the line VI-VI in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Upper cover body 14 Recording paper 17 Image recording part 18 Curl removal part 19 Cutting device 35 Discharge port 36 Frame 37 Fixed blade body 38 Rotating blade body 39 Lower blade frame 43 Upper blade frame 49 Torsion coil spring 53 Safety protector 53a Projection 53b Substrate

Claims (3)

(57) [Claims] 1. A recording apparatus comprising a cutting device for cutting a long recording sheet housed in a case out of the case through a discharge port of the case. The fixed blade body provided in the case such that the longitudinal direction thereof is substantially parallel to the paper discharge port of the case. Is arranged below the feeding path of the recording sheet, the rotating blade is arranged so as to face the upper side of the feeding path, and the rotating blade is arranged from one longitudinal side of the blade edge of the fixed blade. Arranged in an inclined manner so that the gap increases toward the other side,
The rotary blade body is provided with a safety protector for preventing foreign matter from entering from the paper discharge port at a position where the clearance between the fixed blade body and the cutting edge is narrowed, and the cross-sectional shape of the safety protector is fixed. A recording paper cutting device in a recording device, wherein the recording paper cutting device is formed in a convex curve shape protruding toward a gap direction between a blade body and a blade edge. 2. The rotating blade according to claim 1, wherein the safety protector is provided on the rotating blade so that a clearance dimension between the fixed blade and a cutting edge is approximately 5 mm or less. A recording paper cutting device in a recording device. 3. The safety protector is formed such that a cross section in a direction substantially perpendicular to a longitudinal direction thereof becomes larger as a clearance between the cutting edge of the rotary blade and the cutting edge of the fixed blade becomes larger. An apparatus for cutting a recording sheet in a recording apparatus according to any one of claims 1 and 2, characterized in that: